Rough Diamond
Diamond (pure Carbon, C)
Category
Browse mineral (extraterrestrial) specimens identified by the Rock Identifier community.
Rough Diamond
Diamond (pure Carbon, C)
Blue-dyed Quartz Druzy
Silicon Dioxide (SiO2) with artificial pigment
Sugilite
Sugilite (KNa2(Fe,Mn,Al)2Li3Si12O30)
Quartz pebble
Silicon dioxide (SiO2)
Pyrite
Iron Sulfide (FeS2)
Diamond (in jewelry setting)
Diamond (Carbon, C)
Lapis Lazuli
A metamorphic rock primarily composed of lazurite (Na,Ca)8[(S,SO4,Cl)2|(Al6Si6O24)], calcite (CaCO3), and pyrite (FeS2).
Petrified Wood
Silicified Wood (primarily SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Diorite
Diorite (Intermediate intrusive igneous rock)
Gneiss (Granite Gneiss)
Gneiss
Citrine Quartz
Silicon Dioxide (SiO2)
Citrine Quartz
Crystalline Quartz (SiO2) with iron impurities
Quartz (Clear Quartz/Rock Crystal)
Silicon Dioxide (SiO2)
Amethyst (Chevron/Dream Amethyst)
Silicon Dioxide (SiO2) with iron impurities
Quartz (likely Herkimer Diamond style)
Silicon Dioxide (SiO2)
Quartz (Crystalline Cluster)
Silicon Dioxide (SiO2)
Amazonite
Microcline (KAlSi3O8 variant)
Amethyst
Amethyst (Purple Quartz); formula: SiO2 (Silicon Dioxide)
Herkimer Diamond
Quartz (Silicon Dioxide - SiO2)
Sugilite
KNa2(Fe,Mn,Al)2Li3Si12O30 (Potassium Sodium Lithium Iron Manganese Aluminum Silicate)
Druzy Quartz
Crystalline Silicon Dioxide (SiO2)
Moonstone
Potassium aluminum silicate (KAlSi3O8) with Albite (NaAlSi3O8)
Emerald
Beryl (Be3Al2(SiO3)6) with trace Chromium/Vanadium
Amethyst (Faceted)
Amethyst (Silicon Dioxide with iron impurities, SiO2)
Amethyst
Silicon Dioxide (SiO2) with iron impurities
Bloodstone
Heliotrope (Cryptocrystalline Quartz, SiO2)
Quartz with Iron Staining
Silicon Dioxide (SiO2) with FeOx inclusions
Citrine
Citrine (Silicon Dioxide, SiO2)
Amethyst Quartz with Matrix
Silicon Dioxide (SiO2)
Cinnabar in Matrix
Cinnabar (Mercury(II) sulfide, HgS)
Smoky Quartz
Smoky Quartz (Silicon Dioxide, SiO2)
Amethyst
Silicon Dioxide (SiO2) with Fe3+ impurities
Amethyst (Rough Quartz)
Silicon Dioxide (SiO2) with iron impurities
Sunstone
Plagioclase Feldspar (Na,Ca)(Si,Al)4O8
Quartz (Smoky/Milky variety)
Silicon Dioxide (SiO2)
Amethyst
Amethyst (SiO2 with iron impurities)
Rose Quartz Druzy
Silicon Dioxide (SiO2)
Carnelian
Carnelian (SiO2) - Chalcedony variety
Amethyst
Amethyst (Silicon Dioxide, SiO2)
Bloodstone (Heliotrope)
Cryptocrystalline Quartz (SiO2) with inclusions of Hematite or Chlorite
Amethyst
Silicon Dioxide (SiO2) with iron impurities